data/connectivity/graph_description/easy/graph121.txt

In an undirected graph, (i,j) means that node i and node j are connected with an undirected edge.
The nodes are numbered from 0 to 9, and the edges are: (3,6) (3,4) (0,1) (8,4) (1,4) (2,9) (8,5) (4,7) (9,1).